Eating red meat is linked to cancer and heart...

Eating red meat is linked to cancer and heart disease, but are the risks big enough to justify giving up juicy burgers and delicious steaks? Probably not, according to researchers who reviewed data from 12 clinical trials involving about 54,000 people. In a series of controversial papers, the researchers argue that the increased health risks tied to red meat are small and uncertain, and that cutting back likely wouldn't be worth it for people who enjoy meat.

Those conclusions go against established medical advice. They were swiftly attacked by a group of famous U.S. scientists who took the unusual step of trying to stop the papers from being published until their criticisms were addressed.

The new work does not say red or processed meats like hot dogs and bacon are healthy, or that people should eat more of them. The team’s reviews of past studies generally support the ties to cancer, heart disease and other bad health outcomes. But the authors say the evidence is weak, and that there’s not much certainty meat is really the cause, since other diet and lifestyle factors could be at play.

If the latest example of how divisive nutrition research has become, with its uncertainties leaving the door open for conflicting advice. Critics say findings often aren't backed by strong evidence. Defenders counter that nutrition studies can rarely be conclusive because of the difficulty of measuring the effects of any single food, but that methods have improved.

Based on their analyses, the researchers said people do not have to cut back for health reasons. But they noted that their own advice is weak, and acknowledged that they didn't consider factors such as animal welfare and the environment. Indeed, the case that meat production is bad for animal welfare and the environment is stronger than the case that it's bad for human health, according to an editorial that accompanies the report.

Not all of the report authors agreed with its conclusions. Three of the 14 researchers said they support reducing red and processed meats. A coauthor of one of the reviews is also among those who called for a publication delay.

Those who pushed to postpone publication also questioned why certain studies were included in the reviews while others were left out.

As for his own diet, Dr. Gordon Guyatt, a member of the international research team that conducted the reviews, said he no longer thinks red or processed meats have significant health risks. But he said he still avoids them out of habit, and for animal welfare and environmental reasons.

1.What is the author’s purpose in writing the passage?

A.To introduce a new relationship between health and eating red meat.

B.To urge more people to keep away from eating red meat regularly.

C.To present a new controversial view on impacts of eating red meat.

D.To criticize nutrition studies for lacking of conclusive evidence.

2.What is the author’s attitude towards the new research?

A.Doubtful. B.Positive.

C.Disapproving. D.Objective.

3.Guyatt’s avoiding red meats has the weakest connection with ________.

A.health risks B.diet habits

C.animal welfare D.environmental protection

4.What can we learn from the recent research?

A.Red meats don’t have significant health risks.

B.Reducing meat consumption will be worth it.

C.The report authors have reached a consensus.

D.Consuming red meat will do good to health.

高三英语阅读理解中等难度题查看答案及解析

When we hear of dangerous diseases, cancer and heart disease are often what first comes to mind． Recently, a virus (病毒) called Ebola has reappeared in Guinea (a country in West Africa), killing 62 people so far． It leads to viral hemorrhagic fever, which is characterized by high fever and internal bleeding etc, Ebola can kill 90% of those infected, especially in underdeveloped societies like those in Africa.
　　 Ebola is named after the Ebola River, where it was first discovered in 1976．There are five different types of the Ebola virus, each named after where they first happened: Sudan, Ivory Coast, Restoon, Bundibugyo, and Zaire．The deadliest of the five, Zaire, was responsible for the 2012 outbreak, and is believed to be attacking Guinea.
　　 Ebola is naturally found in fruit bats (果蝠), which pass on the virus to other animals by biting or sucking on (吮吸) their blood．Humans who are suffering from the Ebola infection might have touched the bodily fluids (液体) of the infected animals．Once infected, a human becomes a carrier of the deadly virus.
　　 Since we live in an interconnected world, where the situation in one country can affect us all, the influences of Ebola are huge: damaging trade relations, affecting foreign visitors, and weakening entire countries．Already the Guinea virus is spreading fast with a few cases spotted in Conakry — the capital of Guinea, far away from the origin of the virus．It is feared that the disease may have already reached neighboring Liberia and Sierra Leone, too.
　　 Unfortunately, there are no disease-specific treatments for Ebola．Healthcare workers only supply the infected people with water to keep them in good condition．Since there have been many cases of nurses catching the disease from patients, they are forced to wear strict protective clothes, and in some cases, not even allowed to get close to the affected．The fact that there is no cure for the Ebola virus is what makes the outbreak a challenging one to control.
1.The news of Ebola in Guinea is mentioned to ________.
A． make a brief summary
B． introduce the topic of the text
C． compare Ebola with cancer
D． show the latest study of viruses
2.What can we learn about Ebola?
A． It is a newly discovered virus.
B． It is the most dangerous virus in the world.
C． It was named after where it first happened.
D． It could cause immediate death for anyone infected.
3.What is mainly described in Paragraph 3?
A． What the Ebola virus is.
B． The influences of Ebola.
C． The treatments for Ebola.
D． How the Ebola virus spreads.
4.Which of the following does the author probably agree with?
A． Ebola is a highly infectious virus.
B． Ebola is now very common in Guinea.
C． Those with a fever must be infected by Ebola.
D． Females are more easily to be infected by Ebola.

高三英语阅读理解中等难度题查看答案及解析

Cancer is proved to be second only ________ heart disease as a cause of death.

高三英语单项填空简单题查看答案及解析

Cancer is ________ second only to heart disease as ________ cause of death.

A. the; a     B. /; a

C. a; a     D. the; the

高三英语单项填空中等难度题查看答案及解析

Eating too much fat can______heart disease and cause high blood pressure .(皖北示范)

A.contribute to               B.attribute to                C.attend to                      D.devote to

高三英语单项填空简单题查看答案及解析

Eating too much fat can ___________ to heart disease and high blood pressure.

A. contribute        B. devote           C. attend          D. turn

高三英语单项填空中等难度题查看答案及解析

When we hear of dangerous diseases, cancer and heart disease are often what first come

to mind. Recently, a virus called Ebola has reappeared in Guinea, killing 62 people so far. It leads to high fever, bleeding and so on. Ebola can kill 90% of those infected (感染), especially in underdeveloped societies like those in Africa.

Ebola is named after the Ebola River, where it was first discovered in 1976. There are five different types of the Ebola virus, each named after where they first happened: Sudan, Ivory Coast, Reston, Bundibugyo, and Zaire. The deadliest of the five, Zaire, was responsible for the 2012 outbreak, and is believed to be attacking Guinea.

Ebola is naturally found in fruit bats, which pass on the virus to other animals by biting or sucking on their blood. Humans who are suffering from the Ebola infection might have touched the bodily fluids (体液) of the infected animals. Once infected, a human becomes a carrier of the deadly virus.

Since we live in an interconnected world, where the situation in one country can affect us all, the effects of Ebola are huge: damaging trade relations, affecting foreign visitors, and weakening entire countries. Already the Guinea virus is spreading fast with a few cases spotted in Conakry—the capital city of Guinea, far away from the origin of the virus. It is feared that the disease may have already reached neighboring Liberia and Sierra Leone, too.

Unfortunately, there are no disease-specific treatments for Ebola. Healthcare workers only supply the infected people with water to keep them in good condition. Since there have been many cases of nurses catching the disease from patients, they are forced to wear strict protective clothes, and in some cases, not even allowed to get close to the infected. The fact that there is no cure for the Ebola virus is what makes the outbreak a challenging one to control.

1.From the text we know that ________.

A. Ebola is naturally found in fruit

B. Ebola is a highly infectious virus

C. Ebola is a newly discovered disease

D. Ebola is recently controlled in Guinea

2.What is Paragraph 4 mainly about?

A. The causes of Ebola.　　 B. The origin of Ebola.

C. The treatment for Ebola.　　 D. The influences of Ebola.

3.In Ebola infected areas, healthcare workers _______.

A. face the danger of catching virus

B. take measures to protect the nurses

C. give water and medicine to the patients

D. do whatever they can to save the infected

4.The text probably comes from ________.

A. an English newspaper　　 B. a tourist guide

C. a safety brochure　　 D. a medical report

高三英语阅读理解中等难度题查看答案及解析

Eating too much fat can _______ heart disease and cause high blood pressure

高三英语单项填空简单题查看答案及解析

Scientists have produced new evidence suggesting eating lots of red and processed meat damages health．They found big meat eaters had a raised risk of death from all causes over a 10-year period．In contrast, a higher intake of white meat was associated with a slightly reduced risk of death over the same period．

The US study, based on more than 500,000 people, found those whose diet contained the highest proportion (比例) of red or processed meat had a higher overall risk of death, and specifically a higher risk of cancer and heart disease than those who ate the least．

People eating the most meat were eating about 160g of red or processed meat per day— approximately a 6oz steak．Those who ate the least were only getting about 25g per day— approximately a small piece of bacon．Just the opposite, those who ate the highest proportion of white meat had a lower risk of overall death, and a lower risk of fatal cancer or heart disease than those who ate the lowest proportion．

Meat is a major source of saturated (饱和的) fat, which has been associated with breast and colorectal cancer．In addition, lower meat intake has been linked to a reduction in risk factors for heart disease, including lower blood pressure and cholesterol (胆固醇) levels．The latest study adds to a growing body of research linking high red and processed meat consumption to an increased risk of ill health．Ed Yong, of the charity Cancer Research UK, said, “Evidence from large studies tells us that cutting down on processed food, such as bacon or burgers, can reduce the risk of dying from cancer and other diseases．”

Dr Barry Popkin of the University of North Carolina stressed there were health benefits from eating some red meat．But he added: “The need is for a major reduction in total meat intake, an even larger reduction in processed meat and other highly processed and salted animal source food products and a reduction in total saturated fat．” Dr Mark Wahlqvist, a nutrition expert from Australia, said eating small amounts of red meat—around 30g a day—provided a good source of key nutrients．He said, “Fresh, lean red meat of these amounts is likely to be of more benefit than harm．”　　　　　　　　　　　　　　　　　　　　　　

1.According to the passage, we know ______．

A． big meat eaters eat a 6oz steak per day

B． big meat eaters have heart disease ten years earlier

C． people eating more meat will suffer from a heart attack

D． people eating more red meat have a higher risk of death

2.Processed meat is a kind of ______．

A． red meat

B． white meat

C． vegetable with a similar taste of meat

D． meat prepared by producers

3.According to the passage, how should we eat red meat in a healthy way?

A． We should eat red meat as we like．

B． We should eat proper amount of red meat per day．

C． We should reduce the amount of fresh, red lean meat．

D． We should completely cut out red meat from our diet．

4.What does the passage mainly talk about?

A． Too much red meat consumption contributes to ill health．

B． A well-balanced diet accounts for a healthy life．

C． A higher intake of white meat brings benefits．

D． Red meat contains saturated fat．

高三英语阅读理解中等难度题查看答案及解析

Cancer is feared by everyone. And there is more and more fear about cancer. Not the disease itself — there is no such thing as a high incidence rates(发病率) of cancer. Except for lung cancer, mostly caused by cigarette smoking, the incidence rates are not on the rise. However, some kinds of cancer are decreasing. But the fear of cancer is catching, and the country stands at risk of an anxiety. The earth itself is coming to seem like a huge carcinogen(致癌物). The ordinary, more or less, scientific statement that something between 80 and 90 percent of all cancers are due to things in the environment is taken to mean that none of us will be safe until the whole environment is “cleaned up.” This is not at all the meaning.

The 80-percent calculation is based on the unthinkable differences in the incidence of cancer in various societies around the world — for example, the high incidence of liver cancer in Africa and the Far East, stomach cancer in Japan, breast cancer in Western Europe and North America, and the relatively low figures for breast cancer in Japan and parts of Africa and for liver cancer in America. These data show there may be specific environmental influences, but largely based on personal life-style, which determines the incidence of various forms of cancer in different communities — that is all the data suggest. The overall incidence of cancer, counting up all the cases, is probable roughly the same everywhere.

1.According to the passage, the incidence of cancer is generally believed _____.

2.It can be inferred from the passage that the writer’s opinion about the relationship between cancer and environment is _____.

3.According to the passage, the writer seems to feel that _____.

4.Which of the following would be the best title for the passage?

高三英语阅读理解困难题查看答案及解析